Everything is ok , but i used a 4 Ohm resistor in R5, bad marked on the package.
This produces no sound on my system.. Once set up the proper value everything was fine :)..
So Urbancamo design works! And programming directly from TL866 is quick and easy if anyone is interested. I've tried Avrdudes, ProgIsp, avrdude cmdline too.
Thanks Crisp for your support!